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Finding the Fourth Proportional to 291,177.91, 436,785.70 and 91,506.64

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Solution

The fourth proportional to 291,177.91, 436,785.70 and 91,506.64 is: 137,265.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,177.91 : 436,785.70 = 91,506.64 : x
  2. Step 2: Convert to fraction form
    291,177.91/436,785.70 = 91,506.64/x
  3. Step 3: Cross multiply
    291,177.91x = 436,785.70 × 91,506.64
  4. Step 4: Simplify right side
    291,177.91x = 39,968,789,623.12
  5. Step 5: Solve for x
    x = 39,968,789,623.12/291,177.91
  6. Step 6: Final answer
    x = 137,265.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.